Hi Felix, I'm really not sure I understand what exactly you are trying to do. But if you have not tried pyresample yet it might do what you want. See https://pyresample.readthedocs.io/en/latest/
Christoph On Thu, 3 Dec 2020 at 14:16, Felix <[email protected]> wrote: > Hello All, > > I'm here for some suggestions on how to sample from a raster band at > _non-regular_ points. Non-regular in this context means that the points > have arbitrary coordinates and do not lie on a regular lattice/mesh like > all pairs of integers would do. > > In my application, there is an irregular set of points for which we > require bathymetric data (i.e. topographical data/elevation). I started > out by manually reading in the ETOPO1 dataset (for now, we might use > Earth2014 later) and then interpolating around each point sequentially. > As we have up to hundred-tousands of points and doing the computation > sequentially in Python/numpy, this is currently running for days (well, > we canceled it at that point). > > Ideally, I'd like to use something like the "gdal_grid" tool, where the > interpolation algorithm can be configured and the heavy-lifting is done > in C rather than in Python. But it only supports creating a new > _regular_ grid. The inverse distance interpolation with cutoff radii > would be ideal. > > Does such a tool/such functionality exist in in GDAL or was my search > rightfully fruitless? I mainly searched in the raster programs, the > (C++) API of GDALRasterBand and of course generally in the internet. > Thank you for your suggestions, in advance! > > Cheers and Stay Safe > Felix Divo > > _______________________________________________ > gdal-dev mailing list > [email protected] > https://lists.osgeo.org/mailman/listinfo/gdal-dev > -- *Christoph Paulik* | Head of Infrastructure *VanderSat.** Unmatched water data. Satellite observed.* Wilhelminastraat 43a, 2011 VK, Haarlem, The Netherlands M: +31(0)618271928 vandersat.com <http://www.vandersat.com/> | Linkedin <https://www.linkedin.com/company/vandersat> | Twitter <https://twitter.com/VanderSatNL> --------------------------------------------------------------------------------------
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